inner characters deviennent outer

import java.util.*;
import java.io.*;
import java.math.*;

class Solution {

    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        String K = in.next();
        int m = K.length()/2-1;
        for(int i = m; i >= 0; i--)
            System.out.print(K.charAt(i));
        if(K.length()%2 == 1)
        {
            System.out.print(K.charAt(m+1));
            m++;
        }

        for(int i = K.length()-1; i > m; i--)
            System.out.print(K.charAt(i));


    }
}